Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana
Gully formation and upland erosion were studied in the Debre-Mewi Watershed in the Gilgil Abay Basin south of Lake Tana. Gully erosion rates were found to be equivalent to over 500 tonnes/ha/year for the 2008 rainy season when averaged over the contributing watershed. Upland erosion rates were twent...
| Autores principales: | , , , , , , , , , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
2009
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/38179 |
| _version_ | 1855539777571389440 |
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| author | Zegeye, Assefa D. Tebebu, Tigist Y. Abiy, A. Z. Dahlke, H. E. White, E.D. Collick, A.S. Kidnau, S. Dadgari, F. McCartney, Matthew P. Steenhuis, Tammo S. |
| author_browse | Abiy, A. Z. Collick, A.S. Dadgari, F. Dahlke, H. E. Kidnau, S. McCartney, Matthew P. Steenhuis, Tammo S. Tebebu, Tigist Y. White, E.D. Zegeye, Assefa D. |
| author_facet | Zegeye, Assefa D. Tebebu, Tigist Y. Abiy, A. Z. Dahlke, H. E. White, E.D. Collick, A.S. Kidnau, S. Dadgari, F. McCartney, Matthew P. Steenhuis, Tammo S. |
| author_sort | Zegeye, Assefa D. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Gully formation and upland erosion were studied in the Debre-Mewi Watershed in the Gilgil Abay Basin south of Lake Tana. Gully erosion rates were found to be equivalent to over 500 tonnes/ha/year for the 2008 rainy season when averaged over the contributing watershed. Upland erosion rates were twentyfold less. Gully formation is accelerated when the soils are saturated with water as indicated by water table readings above bottom of the gully. Similarly, upland erosion was accelerated when the fields were close to saturation during the occurrence of a rainfall event. Height of the water table is an important parameter determining the amount of erosion and should, therefore, be included in simulation models. |
| format | Conference Paper |
| id | CGSpace38179 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2009 |
| publishDateRange | 2009 |
| publishDateSort | 2009 |
| record_format | dspace |
| spelling | CGSpace381792025-11-07T08:37:41Z Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana Zegeye, Assefa D. Tebebu, Tigist Y. Abiy, A. Z. Dahlke, H. E. White, E.D. Collick, A.S. Kidnau, S. Dadgari, F. McCartney, Matthew P. Steenhuis, Tammo S. hydrology water erosion highlands watersheds simulation models Gully formation and upland erosion were studied in the Debre-Mewi Watershed in the Gilgil Abay Basin south of Lake Tana. Gully erosion rates were found to be equivalent to over 500 tonnes/ha/year for the 2008 rainy season when averaged over the contributing watershed. Upland erosion rates were twentyfold less. Gully formation is accelerated when the soils are saturated with water as indicated by water table readings above bottom of the gully. Similarly, upland erosion was accelerated when the fields were close to saturation during the occurrence of a rainfall event. Height of the water table is an important parameter determining the amount of erosion and should, therefore, be included in simulation models. 2009 2014-06-13T11:40:52Z 2014-06-13T11:40:52Z Conference Paper https://hdl.handle.net/10568/38179 en Open Access application/pdf Zegeye, A. D.; Tebebu, T. Y.; Abiy, A. Z.; Dahlke, H. E.; White, E. D.; Collick, A. S.; Kidnau, S.; Dadgari, F.; McCartney, Matthew; Steenhuis, T. S. 2009. Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana. In Awulachew, Seleshi Bekele; Erkossa, Teklu; Smakhtin, Vladimir; Fernando, Ashra (Comps.). Improved water and land management in the Ethiopian highlands: its impact on downstream stakeholders dependent on the Blue Nile. Intermediate Results Dissemination Workshop held at the International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia, 5-6 February 2009. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.162-169. |
| spellingShingle | hydrology water erosion highlands watersheds simulation models Zegeye, Assefa D. Tebebu, Tigist Y. Abiy, A. Z. Dahlke, H. E. White, E.D. Collick, A.S. Kidnau, S. Dadgari, F. McCartney, Matthew P. Steenhuis, Tammo S. Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana |
| title | Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana |
| title_full | Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana |
| title_fullStr | Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana |
| title_full_unstemmed | Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana |
| title_short | Assessment of hydrological and landscape controls on gully formation and upland erosion near Lake Tana |
| title_sort | assessment of hydrological and landscape controls on gully formation and upland erosion near lake tana |
| topic | hydrology water erosion highlands watersheds simulation models |
| url | https://hdl.handle.net/10568/38179 |
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